Permutation lock



NOV. 15, 1932. l M H BQRZlN 1,887,797

PERMUTATION LOCK Filed June 14. 1930 2 Sheets-Sheet l Nov. 15, 1932. M. H. BQRZIN 1,887,797

'l PERMUTATIN Loox Filed June 14. 1930 2 Sheets-Sheet 2 wan-n 3mm/stu,

Patented Nov. 15, 1932 UNITED STATES 'PATENT- OFFICE MILoN n. BonzIN, orv CHICAGO, nir-.morsk PERMUTATION 1.00K`

Application mea :une 14, 1930. j serial No. 461,190.

this character having rotary permutationv disks, a corresponding keeper to engage with each'of said disks, and supplemental detents or locking elements, and corresponding keepers for the latter.

Other objects and important featuresv are pointed out or impliedV in the following details ofV description, in connection with vthe accompanying drawings in which:

Figure 1 is an elevationV of a door-iframeV having a door hinged thereon and in its wideopen position, said door and door-frame having my invention applied thereto.

Figure 2 is an elevation showing the opposite or inner side of the door-frame, the door beingclosed, but not locked.

Figure 3'is a. detail view showinga fragment of the door and door-frame, the permutation disks being in their .locking position, that is, engaged with theY respective keepers. Figure 41s a detail view showing the door having a part of the'permutation lock secured f3.5 thereto, other parts ofthe permutation lock being detached from the door, arranged inV axial alinement and in order in which they are to be assembled, but spaced from one another so as to show the construction of each element clearly, certain of these partsv being partly in section.

Figure 5 is a detail view of the keeper or slotted plate which is secured on the doorframe and engages with the permutationy plates ordisks when the'door is locked.

FigureV 6 is a view showing a fragment of the door-frame having the keeper secured thereto and also having the pivots of the supplemental locking members shown in a cavityof the door-frame. l -`50 Referring to these drawings indetail, in which similar reference characters correspond to similar parts the several' views, the invention will now be'described in detail as follows f The door-frame 10 may be of any appropriate size, shape and material, and the'present illustration may be considered as vapplying toa small safe or safe-deposit box or inner 'compartment of a safe. ','The `frame is A"lr provided with a cavitv lor keeper-seat 11 "in which is seated a keeper-frame or base 12. (A

slotted keeperplate 13 is secured over the cavity 11, by screws .14 ,or other appropriate means, and this keeper-plate is provided with three parallel bars or keeper-elements4` 15 which Vare separated by slots 162 The plate 13 also has openings or slots k17Y which may either be a continuation of oneoftheslots 16, or be separate therefrom as shown. A '70 The door 18 is hinged `to the frame 10 vat 18, and has secured thereto the parts of the permutation lock which are shown in Figure 4. The permutationV lock may be considered as consisting of three units, that is, the closure-carried unit, the frame-carried unity or keeper 13, and the auxiliary or supplemental locking unit which includes the plate or base 12 andthe locking elements carried thereby.

The door-carried unit consists of a com- 30 bined knob or handle 19, index-disk 20 andV aperatured boss or journal member 21, the

latterbeing provided with a retaining vflange 22. `Retainingplates 23 arev engaged with the flange 22uandare secured on' the door 85 18 by rivets or other appropriate means which may also be employed `for securing keeper elements Qin place. The member 19-20-21 has a reduced pivotal portion 25 extendingfintoth'e hollowaxle or journall member 27 which is slabbed at 28 and provided with a screw-threaded part 29 for engagement with a screw 30, which latter extends through a central opening 31 of a yoke 32 which is riveted or otherwise secured to the door or closure 18. The member 19-20-21 may have any appropriate number of apertures 33 which are interchangeably engageable with a stud 34 on a disk 35 which has a central circular opening 36 which serves as a bearing to receive the rod 27 so that it can rotate around the rod or axle 27 and carry its actuating lug orl stud 37. A spacing-washer 38 is centrally apertured to receive the adjacent endof the axle 27 and to fit against the slabbed side-28, so as to pre-- Three permutation disks 39 have circular openings "and are" vent it from rotating.

mounted for rotation upon the non-rotary axle 27, and two spacing washers 40 are disposed between these disks and have'openings with straight marginal parts that it snugly `against the slabbed side 28 to prevent them from rotating. A washer 41 also lits against the slabbed side and against the inner side of the innermost permutation disk, being yieldingly held against the latter by a compression spring 42, the inner end vof which is seated againstthe yoke 32. Each disk 39 has an outwardly extending actuator or stud 43 and .an` inwardly extending actuator 44, these vstuds beingpositioned for abutting against one another and against the stud 37 when the ldisk 35 is rotated. Each of the disks 39 is approximately circular, but has one straight edge 45 vwhich is provided by eliminating a small segment of the circle. These straight edges 45 are in such relation to the studs 37, 43 and 44, that they are adapted to be moved into the same plane by rotation forward and backward in a manner which is well known to persons who are familiar with this type of permutation lock. t

When the straight edges 45 are in the same plane while the door is closed, and are parallel with the outer face of the keeper or plate 13, they are slightly spaced from the plate 13, and the door can be closed and opened without interference ofthese disks with the keeper-plate. However, if any one of these plates is turned from this position, its arcuiate part will extend through the corresponding slot 16, so it engages with the corresponding keeper element 15, Aand secures the door against being opened. It two of the disks are turned so they extend through the slots 16, the security is doubled.V and if three of the Vdisks extend through the slots 16, the security is trebled, and thisk is trueas to strength of the locking engagement as well as to the difficulty of turning the disks out of engagement with the keeper 13 without knowing the combination of the permutation lock. Y

For making the security of this lock fourc fold, the supplemental or ,auxiliary locking mechanism is provided in the cavity 11. This mechanism includes two duplicate levers 46 each provided with a keeper-engaging part or lug 47, a central opening or bearing 48 and a spring-seat 49. These levers are pivotally mounted on pivots 50 which project from the base-plate 12 through the bearing sleeves 48, which serve to hold these levers in such position that their parts 47 extend through the respective openings 17. A spring 51 has one end against the spring-seats 49, and bears against the latter for normally holding the parts 47 retracted within the cavity 11. The spring-seats 49 extend across all of the slots 16 and in position to be pressed inward by the arcuate partsof the disks 39. Therefore, when any one of the disks 39 extends through'the corresponding slots 16, both le- -vers46 arev actuatedthereby, so their parts 47 extend through slots 17 and thus engage with thekeeper 13 so as to supplement the llocking effect Yof the disk or disks 39.

. In changing the combination, it is only necessary for the disk 35 to bemoved inward a slight distance and held while the knob 19 is turned, so the stud k34 will be engaged `with .another one of therecesses 33. In order that the disk 35 may thus be moved, the screws 32a must be loosened, or ythe inner ,disk 39 'it will return to its normal condition or relation, for-it is composed ot somewhat springy material. f Y

Although Ihaver described this embodiment of my invention specifically, it lis not my intention to limit my patent protection to theseeXact detailsof construction and arrangement, for the invention is susceptible of vnumerous changes within the scope of the inventive ideas vas implied and claimed.- Y Y vWhat I claim as my invention is:

f y1. In a permutation lock, the combination rotary-plate having a straight edge and an arcuate edge, a keeper-plate mounted on the closure-frame andV having a slot through which said arcuate edge is adapted to extend for ylocking engagement with the keeperplate, and a supplemental locking device including a lever ywhich is operable by'said arcuate edge, said closure being provided with Va keeper-element for engagement withV said lever, and meansto move' said lever for unlocking said' supplemental locking device when said arcuate edge is movedout of engagement with said lever. Y.

2. In a locking device, the combinationlof a closure-frame having a cavity therein,a closure engaged with said closure-:trame for `closing it, keepers on said closure, two complemental ylevers pivotallymounted in said cavity and each provided with a part which is movable into engagement with a corresponding one of said keepers, yielding means to normally hold said levers out of engagement with said keepers7 a keeper-plate disposed over said Cavity and having a slot substantially between the keeper-engaging parts of said levers, and a plate mounted for rotation on said closure and provided with a part which is adapted to extend through said slot 10 of the keeper-plate and to eo-act therewith for locking the closure and for actuating said levers so as to oause their engagement with the keepers on said Closure.

In testimony whereof I affix my signature.

MILON H. BORZIN. 

